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mirage-kv 2.0.0 #65

Merged
merged 4 commits into from Apr 8, 2019
Merged

mirage-kv 2.0.0 #65

merged 4 commits into from Apr 8, 2019

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hannesm
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@hannesm hannesm commented Mar 2, 2019

this upgrades tar-mirage to the mirage-kv 2.0.0 API :D

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hannesm commented Mar 2, 2019 •
edited

while doing this port, I noticed that this is unlikely to work on Solo5, where block_read expects at most one sector to be read -- while in tar-mirage, BLOCK.read gets a single huge buffer passed. do other block backends (unix/xen) have the same semantics as solo5-block? .oO(feels like a revision of mirage-block needs to be done /cc @g2p @samoht @mato)

I also noticed that while sector_size is available, there are various instances of 4095 and 4096 hardcoded in tar-mirage, also 512. in addition, the code looks a bit suspicious in terms of integer overflows (+ and add are used without checking, lots ot Int64.to_int without checks)

@hannesm hannesm mentioned this pull request Mar 2, 2019
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@hannesm hannesm requested review from avsm and djs55 March 2, 2019 16:09
jberdine pushed a commit to jberdine/opam-repository that referenced this pull request Mar 2, 2019
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[new release] tar-mirage, tar and tar-unix (1.0.0)
f31e2ab 
CHANGES:

- port build to dune from builder (@avsm)
- upgrade opam metadata to 2.0 (@avsm)
- remove topkg in favour of dune-release (@avsm)
- use modern `ppx_cstruct` instead of `cstruct.ppx` (mirage/ocaml-tar#65 @avsm @djs55)
- test with OCaml 4.07 as well (@avsm)
avsm
avsm reviewed Mar 3, 2019
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mirage/tar_mirage.ml
| Ok data -> Ok (Digest.string data)

(* Compare filenames without a leading / or ./ *)
let trim_slash x =
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Is this function something that can be replaced with Fpath.normalize use?

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We're using Mirage_kv.Key, where I can't find such a function. But maybe worth an addition!

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mato commented Mar 4, 2019

feels like a revision of mirage-block needs to be done /cc @g2p @samoht @mato

See Solo5/solo5#325 (comment) for what needs to be done in Solo5 to support block operations in multiples of the block size.

hannesm referenced this pull request in mirage/docs Mar 20, 2019
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remove tar-mirage as it conflicts with new kv-lwt
34c4317
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hannesm commented Mar 20, 2019

ok, thanks. the block read/write did not change in this PR, and should be addressed in other PRs. IMHO this is ready to be merged + released to unbreak tar-mirage with mirage 3.5.0 (which uses mirage-kv 2.0.0). any concerns about merging this PR?

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samoht commented Mar 20, 2019

LGTM

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hannesm commented Mar 29, 2019

how can we move forward here? tar-mirage is atm not compatible with mirage 3.5.0 due to the changes in mirage-kv. IMHO it'd be great to have this merged and released //cc @djs55

@samoht samoht merged commit 8d76b56 into mirage:master Apr 8, 2019
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djs55 commented Apr 9, 2019

@samoht thanks for taking care of this!

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